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Study the following information carefully and answer the questions.For a room, the rate of painting is Rs. 3200 per square metre. The rate of carpeting per square metre is 120% of that of tiling. The cost of decorating the room Is 14 times to that of carpeting on the floor. The cost of electrification is 75% of that of carpeting the floor. The rate of tiling on the floor is 125% of that of painting. The dimensions of the room are 6 m x 6m x 5m.

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Study the following information carefully and answer the questions.

For a room, the rate of painting is Rs. 3200 per square metre. The rate of carpeting per square metre is 120% of that of tiling. The cost of decorating the room Is 14 times to that of carpeting on the floor. The cost of electrification is 75% of that of carpeting the floor. The rate of tiling on the floor is 125% of that of painting. The dimensions of the room are 6 m x 6m x 5m.


What is the ratio of the cost of painting the four walls of the room and that of decoration ?
1). 10 : 63
2). 10 : 61
3). 10 : 21
4). 21 : 10


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2 answers

0 vote
Answered by on | Votes 0 |
Solution

Cost per square metre,

Rate of painting = 3200

Rate of tiling = $\frac{125}{100} * 3200$ = 4000

Rate of carpeting = $\frac{120}{100} * 4000$ = 4800

Rate of decorating = 14 * 4800 = 67200

Area of the 4 walls = 2 * 5 * (6 + 6) = 120 sq. metre

Area of the floor = 6 * 6 = 36 sq. metre

=> Expenditure on decoration = 36 * 67200 = 2419200

Expenditure on painting = 120 * 3200 = 384000

$\therefore$ Required ratio = 384000 : 2419200 = 10 : 63

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3 vote
Answered by on | Votes 3 |
Solution

Cost per square metre,

Rate of painting = 3200

Rate of tiling = $\frac{125}{100} * 3200$ = 4000

Rate of carpeting = $\frac{120}{100} * 4000$ = 4800

Rate of decorating = 14 * 4800 = 67200

Area of the 4 walls = 2 * 5 * (6 + 6) = 120 sq. metre

Area of the floor = 6 * 6 = 36 sq. metre

=> Expenditure on decoration = 36 * 67200 = 2419200

Expenditure on painting = 120 * 3200 = 384000

$\therefore$ Required ratio = 384000 : 2419200 = 10 : 63




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